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From "Karthik Kambatla (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-5830) Avoid preempting AM containers
Date Tue, 24 Jan 2017 19:02:28 GMT

    [ https://issues.apache.org/jira/browse/YARN-5830?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15836441#comment-15836441
] 

Karthik Kambatla commented on YARN-5830:
----------------------------------------

bq. The following code seems like buggy since when we invoking scheduler.completedContainer(
in PreemptContainersTask, it will release the resources from the containers preempted, but
these resources cannot be preempted again.

I am not sure I fully understand. If the container is killed, aren't its resources also taken
back? 

> Avoid preempting AM containers
> ------------------------------
>
>                 Key: YARN-5830
>                 URL: https://issues.apache.org/jira/browse/YARN-5830
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: fairscheduler
>            Reporter: Karthik Kambatla
>            Assignee: Yufei Gu
>         Attachments: YARN-5830.001.patch, YARN-5830.002.patch, YARN-5830.003.patch, YARN-5830.004.patch,
YARN-5830.005.patch, YARN-5830.006.patch
>
>
> While considering containers for preemption, avoid AM containers unless absolutely necessary.




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